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MathGroup Archive 2002

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Re: Examples using Trig option

  • To: mathgroup at smc.vnet.net
  • Subject: [mg35257] Re: Examples using Trig option
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Fri, 5 Jul 2002 02:18:58 -0400 (EDT)
  • Organization: Universitaet Leipzig
  • References: <afugd0$rr4$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

In[]:=Expand[Sin[x]^2*Cos[2x], Trig -> #] & /@ {True, False}

Out[]={Cos[x]^2*Sin[x]^2 - Sin[x]^4, Cos[2*x]*Sin[x]^2}

??

Regards
  Jens


"Ersek, Ted R" wrote:
> 
> Hello  mathgroup,
> 
> The usage message for Trig says:
> 
> Trig is an option for algebraic manipulation functions which specifies
> whether trigonometric functions should be treated as rational functions of
> exponentials.
> ---------
> 
> The built-in functions that have the Trig option are:
> Apart, ApartSquareFree, Cancel, Coefficient, CoefficientList, Collect,
> Denominator, Expand, ExpandAll, ExpandDenominator, ExpandNumerator,
> Exponent, Factor, FactorList, FactorSquareFree, FactorSquareFreeList,
> FactorTerms, FactorTermsList, FullSimplify, Numerator, PolynomialGCD,
> PolynomialLCM, PolynomialMod, Resultant, Simplify, Together.
> 
> After searching all available documentation I can't find a single example of
> where
> f[expr, Trig->True]   would give a different result than
> f[expr, Trig->False], and I can't come up with one on my own. Can you give
> some examples. An example for each function above is not necessary.
> 
> ---------
> Thanks,
>   Ted Ersek
>   Get Mathematica tips, tricks from
>   http://www.verbeia.com/mathematica/tips/Tricks.html


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